7782-63-0 Usage
Uses
Used in Chemical Analysis:
Ferrous sulfate heptahydrate is used as a reagent in quantitative analysis of nitrates and in qualitative analysis, specifically the "brown ring" test for nitrates.
Used in Manufacturing:
It serves as a precursor in the manufacture of iron (Fe), iron compounds, other sulfates, and is used in the production of fertilizers, food and feed supplements, and as a reducing agent in various chemical processes.
Used in Electroplating:
Ferrous sulfate heptahydrate is utilized in iron electroplating baths to deposit a layer of iron onto other metals.
Used in Water Treatment:
It is employed in industrial water treatment plants to remove phosphate, which helps in managing water quality and preventing eutrophication.
Used in Horticulture:
Ferrous sulfate heptahydrate is used in the prevention of chlorosis in plants, a condition that arises due to iron deficiency, and in the treatment of iron chlorosis in horticulture.
Used in Woodworking:
Woodworkers use aqueous solutions of ferrous sulfate to give maple wood a silvery hue, enhancing its appearance.
Used in Ink Production:
It is actively used in the manufacture of ink, including iron gall ink, which has historical significance in calligraphy and printing.
Used in Gold Refining:
In the gold refining process, ferrous sulfate heptahydrate is used to precipitate metallic gold, aiding in the purification of the metal.
Used in Textile Industry:
As a mordant for wool dyeing, it helps in fixing dyes to the fabric, ensuring colorfastness and vibrancy.
Used in Environmental Applications:
Ferrous sulfate heptahydrate acts as a reducing agent, participating in the reduction of chromate in cement, which is important for environmental safety and reducing toxic emissions.
Used in Pesticides:
It finds application in other pesticides, contributing to the control of pests in agriculture.
Used in Engraving and Etching:
Ferrous sulfate heptahydrate is utilized in process engraving and lithography, as well as in etching aluminum, due to its etching properties.
Used in Leather Industry:
It serves as a dye for leather, providing color and enhancing the appearance of leather goods.
Solubility in water (g/100mL)
Dissolved grams in 100 mL water at different temperatures (°C):
28.8g/0℃: 40g/10℃;48g/20℃;60g/30℃;73.3g/40℃
101g/60℃: 79.9g/70℃;68.3g/80℃;57.8g/90℃
Preparation
By-product Method: byproduct of titanium dioxide production:
Titanite is decomposed with sulfuric acid to obtain titanium dioxide, ferrous sulfate(II) and ferric sulfate (III). Iron (III) compounds are reduced to obtain iron (II) compounds. The mixture is then cooled and crystallized to form ferrous sulfate.
5H2SO4+2FeTiO3→2FeSO4+TiOS04+Ti(SO4)2+5H2O
Sulfuric acid method
Scrap iron is dissolved with a mixture of diluted sulfuric acid solution and mother solution. The reaction temperature should be below 80°C, otherwise, it results in the sedimentation of ferrous sulfate monohydrate. Clarification is applied to remove impurities from the slightly acidic ferrous sulfate solution. Cooling and centrifugation are carried out obtain light-green ferrous sulfate.
Fe+H2SO4→FeSO4+H2↑
Acute Toxicity
Oral-rat LD50: 1389 mg/kg; oral-mouse LD50: 1520 mg/kg.
Flammability Hazardous Characteristics
Not flammable, change into ferric oxide smoke at high temperature.
Storage and Transport
Stored in well-ventilated area, low temperature and dry.
Extinguishing Agent
Water, carbon dioxide, dry powder, sand.
Reactivity Profile
Ferrous sulfate heptahydrate is a weak reducing agent.
Health Hazard
INGESTION: abdominal pain, retching, diarrhea, dehydration, shock, pallor, cyanosis, rapid or weak pulse, shallow respiration, low blood pressure.
Safety Profile
Poison by intravenous,
intraperitoneal, and subcutaneous routes.
Moderately toxic by ingestion and rectal
routes. Mutation data reported. When
heated to decomposition it emits toxic fumes of SOx.
Purification Methods
Crystallise the sulfate from 0.4M H2SO4, or precipitate it from an aqueous solution with EtOH. It is efflorescent in dry air, and is converted to the tetrahydrate at 57o, then to the monohydrate at 65o (or by heating the heptahydrate in a vacuum at 140o). It forms a brown-black complex, FeSO4.NO, with nitric oxide and is used in a qualitative test for nitrates (“brown ring” test).
Check Digit Verification of cas no
The CAS Registry Mumber 7782-63-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,8 and 2 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 7782-63:
(6*7)+(5*7)+(4*8)+(3*2)+(2*6)+(1*3)=130
130 % 10 = 0
So 7782-63-0 is a valid CAS Registry Number.
InChI:InChI=1/Fe.H2O4S.H2O/c;1-5(2,3)4;/h;(H2,1,2,3,4);1H2
